984 is a good score in your board exams to get a seat in CSE branch in sastra University but however getting a seat in sastra University doesn't depend alone on the marks you secured in your state board it also depends on the rank to secure in the sastra entrance examination. To be precise about your doubt your score is enough to get qualified for CSE branch considering you are a general category student. However you need to attend the sastra University entrance exam to confirm your seat in CSE student