Now, as per the latest update, VITEEE and SRM entrance exams are cancelled. The admissions to both the institutions will be based on the CBSE board % marks. Till now, there has not been such situation earlier. So, it is not easy to guess the admission chances on the basis of marks scored. But you may assume that with 85.45 % marks, you have sufficient chances of getting admission into any of these institutions.

Hope it helps.