It is predicted that for this year the cutoff for OBC will be somewhere around 85. So by prediction it seems you will clear the cutoff but nothing can be said precisely or accurately. Not just the cutoff but the actual rank also cannot be predicted accurately. You will have to wait for the results to come. You can check previous years cutoff on the following link: 

https://engineering.careers360.com/articles/jee-advanced-cutoff/amp