Maximum manfuacturers operating temperature for the RTX 2060 is 88 degrees.
Obviously cooler components are happier components, but I wouldn't be too worried unless I was constantly sitting over 85.
If you can improve air flow in your case, do so, as it does help, but also remember that your ambient temperature is important, as for each degree you are above normal test condition temperatures, you are a degree hotter as you induce load.
Sounds normal to me, just try and maximise cool air flow if you can and try and keep the GPU temps below 80 if you can. Anything above 85 and I'd start trying other methods.