The interim coach told Sky Sports News: "It is a pretty special day for the Wales team. We kept on saying we hadn't become a bad team overnight. Fine margins are the difference in Test match rugby.
"The players showed character and our defence put France under a lot of pressure. The players deserve all the accolades.
"The belief and confidence you can get from a result like this is so important, and we can take that with us to Italy now."
The win ends a run of eight consecutive losses for the Welsh team.