Hi there,
Hope you are doing well.
98.5 percentile will give you a rank of around 12,500 which is really good.
With this rank, you can expect seats in almost all IIITs like CSE in:-
1) IIIT Gwalior
2) IIIT Kancheepuram
3) IIIT Jabalpur
4) IIIT Kota
5) IIIT Sonipat

Hope it would help.
Check out our JEE Mains college predictor to see your chances for various NITs, IIITs, GFTIs:-
https://engineering.careers360.com/jee-main-college-predictor

T hank You.

As per your rank and previous year cutoff, the colleges you get are:-

IIIT Nagpur

IIIT Ranchi

SVNIT Surat

Visvesverya NIT Nagpur

To know more about your chances of getting other colleges check out the college predictor link below:

https://engineering.careers360.com/jee-main-college-predictor