I’ve never worked help desk, but to me you look good, not goofy or sleazy at all.

And ordinarily since your clothes are essentially a perfect fit for the role I wouldn’t even give it a second thought, but since you are here asking I’m going to try to offer some additional thoughts:

From my personal perspective (since I don’t know who really pays attention to what level of detail) I’d just recommend to make sure

• everything is well tucked in
• shirt and pants neat and straightened to remove as many bunched up/wrinkle spots as possible

The shirt, pants, and belt are all totally fine if not good. No complaints from me on your choice of apparel.