hi,

sastra takes admission based on two type of admission process.

stream 1 -jee main score =12th course, now your jee main score is decent and have good score in 12th, 75% of seats will be filled through stream 1 mode, in stream 1 mode, 75% weightage is for 12th score and 25% weightage is for jee main score, however at this score you have fair chances for cse in sastra, but jee main july session exam is yet to held and cutoff varies time to time based on number of participants, questions difficulty level, seat matrix etc.

however try to relax and lets see what comes around.