No, that's nonsense; there was no "data entry" degree. A while back I checked to see if the gender disparity numbers for computer science were skewed due to a decline in "business programming" or any other computer related degrees; they weren't. The related fields followed the same pattern as computer science itself. And it was in the 1970s, not the 1980s, that the existence of a CS degree (rather than a specialization) become commonplace.
Note that the gender disparity graph for computer science is unique. If you look at NPRs graph (and don't listen to what they're saying, which doesn't match their own graph), you see that for a decade before the peak, the percentage of women in CS rose much faster than it did in other fields. Then you get that unique 1984 peak, a sharp decline, and a long slow decline followed by another sharp decline that was general.
The rise of the personal computer is certainly tempting to explain that peak. But it's a peak in degrees granted. IMO, it's a little bit too early if the problem was boys having early exposure to computers which was denied to girls; the personal computer barely started taking off in 1979, the year before 1984 graduates would have been entering college. But certainly there could be other reasons related to the personal computer.