I set my own goal weight...my starting weight on surgery day was 218 lbs and a 41 BMI.
I'm vertically challenged at only 5'1", so I'm short. My original goal weight was 110 lbs and a 20 BMI, but since I was losing so slowly, I readjusted my expectations at 3 months out.
My revised goal weight was 130 pounds, which placed me at a BMI of 24.7 (upper limit of normal). I reached 130 pounds at 14 months out and decided to keep going.
I entered maintenance at 118 pounds and a BMI of 22. Not only do I like how I look and feel at this weight, but it's been easy to maintain.
The moral of the story: you'll need to devote additional effort if you want to get to 135 pounds, but it is possible in spite of what your surgeon says.
Good luck to you.