Question about ASUS Z170-Deluxe

Yes, this MB will fit the i7-7700k as it also has socket LGA 1151.

I don't think the i7-7700k will fit on this MoBo. The MoBo does not support the 7th generation. You are better off with this MoBo on the i7-6700k.
But I think you already figured that out yourself.