Admission in Sastra University for B.Tech and Integrated M.Tech course is done on two modes

1. 70 % of seats will be filled based on +2 aggregate marks and 1st JEE Main Score.

2. 30% seats will be filled based on +2 aggregate marks

Since only 30% of seats are available in mode 2. It will be a tough competition. But you can be confident enough since you have a very good percentile. Best of Luck.