HELLO HIMANSHU
The official cutoffs are yet to be decided but let me give you the previous year data
Snce ypou did not ention your categorey let me assume it to be geners\al by default
MNNIT ALLAHABAD
Civil Engineering 18118
Mechanical Engineering 13139
Electrical Engineering 11439
Electronics and Communication Engineering 8433
Computer Science and Engineering 4714
Chemical Engineering 14810
For more previous year cutoofs plaese visit this link https://engineering.careers360.com/articles/jee-main-cutoff-for-mnnit-allahabad

IIIT ALLAHABAD
Electronics and Communication Engineering 10575
Information Technology 5938
Information Technology-Business Informatics 7057

for more cutoofs visit this link https://engineering.careers360.com/articles/jee-main-cutoff-for-iiit-allahabad
Now in short if your percentile is above 98+ then you may have a decendt chance of getting into this institues.
HOPE IT HELPS!!