Hello aspirant.

You haven't mentioned your category , it would to be easier if you have mentioned category.

Official qualifying marks will be declared once the result is announced.

Considering last few years qualifying marks , for general category in 2018 qualifying marks were 74,in 2017 it was 81 , in 2016 it was 100.

As you have score 158 marks , you may be eligible to write JEE advanced.

For more information refer

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

All the best.