I'm not sure I follow every detail of your situation, but in general fonts can be controlled from either the software sending the report to the printer or the hardware.
The most common way to adjust your font is through software. Try applying a different font to the portion you aren't satisfied with (the way to do this will vary depending on what application your are talking about).
If your application can't set the font, try to set a new default font on your HP printer. It isn't as convenient to do it this way, but it might get you out of a scrape...
Hope this helps,
Howard H.