CAT

Minimum CAT percentile required is 70 to be eligible for admission process, along with minimize of 50% in UG. Christ university does not consider XAT score. A composite score of 600 or above in the Management Aptitude Test (MAT) conducted by AIMA in either September - 2015 or December 2015 OR a composite score of 450 or above in GMAT 2015 OR 70 percentile or above in the Common Management Admission test (CMAT 2015) OR 70 percentile or above in the Common Admission test 2015 (CAT) conducted by the Indian Institutes of Management (IIMs) OR 70 percentage or above in the AIMS Test for Management Admissions (ATMA) 2015 And 50% or above marks in aggregate in the undergraduate examinations. (Applicants who are in the final year of their studies should have 50% or above aggregate in all the semesters / years of undergraduate examinations conducted so far). Students writing their final degree examinations during March-May 2016 are also eligible to apply.

With your score you can check:
CAT:
Indian Academy School of Management Studies, Bangalore
Indian Academy School of Management Studies
SSN School of Management, Chennai
Ramaiah Institute of Management Studies, Bangalore
Institute of Business Management & Technology, Bangalore
K.S. School of Engineering and Management, Bangalore
PES University, Bangalore
Adarsh Institute of Management & Information Technology, Bangalore
MAT:
Acharya Bangalore B-School, Bangalore
Millennium School of Business, Delhi
Indus Business Academy, Greater Noida
Indian Institute of Financial Planning, Delhi
Indus Business Academy, Bangalore
Sri Chandrasekharendra Saraswathi Viswa Mahavidyalaya
IIMT School of Management, Gurgaon
Holy Mary Business School, Hyderabad

Thejasvi, To get into top colleges you need to score good. I would suggest you to take the exam again and study hard this time. To get admission into top colleges, you need atleast 80 percentile in your exam.
You may look up to other entrances like MAT, SNAP, XAT, etc as well as it will open doors to more number of colleges. Concentrate more on your preparation with the aim to crack the next with a much higher score.
To score good you need toclear your basic concepts, work on your vocabulary, develop the habit of reading, reasoning skills can be improved by solving puzzles, practice a lot, once you know your strengths and weaknesses, go for some full-length tests. Observe how you improve your score with each passing test and lastly revise. All the best!