Greetings !!

Generally there is No pre fixed cutoff for competitive exams. Usually the cutoff in any exam depends upon the following factors :

1. Number of Seats
2. Previous year cutoff trends
3. The difficulty level of the exam
4. Average marks scored by the candidates
5. Number of candidates appeared for the test.

If you can score  more than 80 % then it will be considered as good score. if any doubts pls feel free to ask.

All the best !!