A few ways to do it in RB.

If you grab the bottom of a track in the Tracks window, you can drag it down to tinker with the volume envelope as Herb mentioned.

You can highlight the section and use Edit-Audio Effects- Gain change on any section of a track to do the same thing you did in Audacity.

You can put a compressor on it and see if that helps.

Different methods for different needs. In the Audio Effects-Gain Change window you can just use the regular Gain and boost that section a couple decibels.
Normalize boosts the whole track (which you also did in Audacity). Pay attention to the check boxes on the left.

When punching in you may be able to look right away and see if there is a volume difference, if there is you can go ahead and use the Gain effect while you have the section highlighted already.. to save time.

I do not work here, but the benefits are still awesome
Make your sound your own!