Help with sleeves

Im currently knitting a sweater and just starting the sleeves.
The pattern says working in st-st inc 1 st at each end of 5th row and every following 8th row.
I currently have 36 st on my needle and should end up with 44
How do I go about this?

Welcome to KH!
Increase at each end of row 5 and then rows 13,21,29. That should bring you to 44sts.