Hello Aditya, 

Well your performance is good in CAT and academically too,  you have performed really well.  

Talking about the overall percentile,  this score of 135 will fetch you a percentile of 95+.

Coming to your sectional cutoffs:

VARC:  80 percentile+

DILR:  90 percentile+

QA:  90 percentile+ 

(Note:  these sectional cutoffs and percentiles are solely based on the previous trends) 

Talking about the colleges whose cutoff you would meet:  

The major factor that would play in your favour is your academic diversity (science)  which must give you calls from almost all new IIMs and few old IIMs too (like IIMA,  B, C, L, K, I). 

You must now start preparing for your further rounds of GD/WAT-PI. This is going to remain constant for all the IIMs,  wherever you get a call from.  Most IIMs have though done away with GD yet you must leave no stone unturned in your preparation. 

Start brushing up your concepts of graduation subjects.  Try to link them with MBA and justify your choice of MBA. 

Stay up to date with what's happening around in economy,  business,  society,  etc. 

Read good articles in newspapers and magazines to shape your views and help you in WAT. 

Hope this helps!  

All the best!