Will a tailgate window from a 1984 ford bronco fit 1994 bronco?

No, a tailgate window from a 1984 Ford Bronco will not fit a 1994 Bronco. The design and dimensions of the tailgate and its components changed between these model years. While both are Broncos, the differences in body styles and mechanisms make the parts incompatible. It's best to source a tailgate window specifically designed for the 1994 model.