Hard to give an opinion on image quality as that snapshot looks like it's from a web interface or something is downsampling the original image.
I'm going to say that's a 36" wide commercial door with about a 2' wide sidelight. The box looks like it's covering an area ~60" wide then (door + sidelight + a few inches next to the door)
If Stream 1 is the native resolution of the camera, and the box is 252x403 pix, then for ppf you have:
252px/5' = 50ppf. 50ppf should give you pretty good detail for the area around the door.
Check out: Pixels Per Foot Demonstration Videos
Agree with the 50ppf.
It looks like the varifocal is not fully tele yet; if you need more detail and are only interested in the highlighted area, you may be able to get a bit higher PPF on target by increasing the focal.
"What is your impression of the image quality in terms of the level of identification in the shadowed area?"
Have a person stand at the doorway. That is a lot more effective in determining image quality than us guessing abstractly.
John and others are correct. If you want a better opinion we would need more to work with - a subject in the picture. However, using the camera calculator and roughly estimating the distances, it would appear that you have your lens on approximately 6mm, and the camera is mounted about 32-35 feet from the door; it looks like one would expect it to look. The PFF Brian calculates speaks for itself.