This question is essentially timing the market. There is no way to know for sure what will happen.
While it's not likely either of these stocks is in for a big dip in the near future, a safer bet would be to pull it out and put it into ETFs.
But if you're asking for a prediction from someone that has no idea:
Personally, I would sell AT&T and keep Disney. Then take what you sold AT&T for and put it into Vanguard or similar.
7% of current AT&T would mean she bought around $40. The stock has been under $40 more than over $40 for the past 15 years, and hasn't been above $50 since early 2001.
Disney is trending upward consistently, and they own so many huge licenses, I can't see them plateau. Marvel, Star Wars, and Classic Disney titles will be popular for the rest of our lives.