sdandrea1 They are saying that if you hit nine greens, the upper end of the expected score is 79, which is seven over at most courses.
So, they are assuming you two-putt at worst on all the greens you hit, and that you get up and down twice on the other nine holes, meaning you would be allowed two putts on the other seven greens you missed.
Total putts 34 to score 79, 30 putts to score 75, qt the low end of your 'expected' score.
No double chips.