You have posted in the Adobe Premiere Elements Forum (video editing).
What version of Premiere Elements (video editor) are you using and on what computer operating system is it running?
Premiere Elements has a Sharpen Effect that can be applied to a still in your video project, but I suspect that it is not going to make much of
an impact on an badly out of focus photo.
If you do a Google search with the title "out of focus photos", at least one company will show up which claims
to specialize in the type of software that improves the out of focus situation.
You may want to ask the people in the Adobe Photoshop Elements Forum for tips on your situation.