Hi Rittick, 

Good to know that you are expecting 85 percentile in XAT 2019. 

Here are the colleges you can try for after having secured  85 percentile -

XISS Ranchi

TAPMI

XIME Bangalore

XIM Jabalpur

BIMTECH Greater Noida

IFMR Chennai

I suggest you to try the XAT College Predictor tool which will show you the most suitable colleges you can get or percentile/score needed for getting into different colleges. 

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https://bschool.careers360.com/pathfinder/xat