Hello Student
In your percentile of marks that is 89.9093  possibly in jee mains your marks will be 69- 78.and rank will be 116542  to 92303.Although prediction for rank and marks vary depending Some definite factors like number of student appear in the exam,difficulty level of Questions,number of students become successful in the exam.If one of the factors vary from the previous year then whole calculation will be in hapazard.
Hope this helps.