SUM(IIF([Status]="Delivered",[Point],NULL)) / SUM([Point])
I assume that your column named Order No. extends all the way down each row (i.e., each row should have a 1 as Order No. but the screenshot does not show that.
Also, the above only works if the status of "Delivered" is consistently cased, which it is not in the screenshot. If it is not consistently cased, wrap [Status] in an Upper function:
SUM(IIF(UPPER([Status])="DELIVERED",[Point],NULL)) / SUM([Point])