The life of 7284/5284 was short lived, replaced by the 7263/5263 (another failure) and the 7229/5229 in 2003. The emulsion # on that stock would place those rolls in the earlier time frame of the 84's roll out in 2001/2002- Kodak emulsion #'s increase as newer batches are made of a particular film stock, and how quickly the emulsion #'s increase depends on sales of that particular film stock. I would send that stock in for fog testing at your local lab. Doesn't matter if that film has been kept in the fridge for a "few" years. You'll find out how well it was stored prior to those "few" years by looking at the density readings (RGB numbers - if they are too high, then I would say forget about it) and examining the exposed negative.
Jason
Certified Film