IN about 8k hours of flying the 757, I think I have never been limited by MZFW (85,2 t) on the passenger airplane. We are out of belly space before that happens.
Our 757s DOW initially was around 59t. But like humans tend to do they have added some weight over the years... most now around 61-62t.
Probably less of an increase percentage wise, than I have suffered personally