Generally cutoffs changes each and every year but in general if you consider previous year cutoffs then i don't think you can get NIT- Surathkal with this rank.

Previous year cutoffs:

B.Tech Civil Engineering: 14K

B.Tech Chemical Engineering: 15K

B.Tech Metallurgical and Materials Engineering: 17K

B.Tech Mining Engineering: 28K

Hey!

With 84.5 percentile in jee mains and OBC category, you might secure rank between 40-50k (according to the previous years records). And, with this rank you might get seat in nit surathkal in 4-5 round of counseling, possibly you won't get your desired seat. To know more, kindly visit the link given below to check the cutoffs

https://www.google.com/amp/s/engineering.careers360.com/articles/jee-main-cutoff-for-nit-surathkal/amp

Good Luck