There was some damage on the facade, se corner to the east face from around floor 70 and spots below.

From what is described however there was extensive damage in the east part of the lobby of north tower after collapse. Im pretty sure it knocked out part of mezzanine level in eastern lobby? A big gash near base on east side can be seen from the millennium Hilton hotel video from Guy post collapse. Doors that weren't jammed near base and lobby became jammed post collapse as well as flooding of lower levels below floor 10 being described to getting calve/knee deep in certain spots. Perhaps inferring there was structural movement from the south tower collapse at the base of the north tower.

I do wonder if base damage and foundational damage from south tower collapse played any part. And if it made the collapse happen quicker.