Hello Sayali. According to the last year's data for the admission into JBIMS, the last person to get into JBIMS in ST category had 84 marks. This score is roughly around 87 percentile for the MH-CET MBA 2018. So, going by the last year's trend, your are going to the great old red building.

https://bschool.careers360.com/articles/jbims-mumbai-cutoff

Hope this helps.

All the best.