Trump must have had a really bad day or two after the tape came out (6-7 point drop in one day like you suggested) for this more than one point drop to happen.
This poll usually only moves in tenths of one percent one way or the other in one day, not more than one percent.
Some of the subgroups have huge daily jumps. The African American group caught my eye the first time it jumped up (and right back down exactly 7 days later).
I think the poll is manipulated by the pollster, and easy to manipulate.