First off, Go in "Head to Head" games, then "quick-match". You might be able to get to it from another way, but this is how I know how to do it. Then, you just play football.
This does not have to be done in one game. You can score lower amounts in a few different games and it all adds up. Once you have scored a TOTAL of 34 points across all Ranked Head to Head games, the achievement should pop. I do want to say (if this is like Madden 25 for Xbox 360) that if your opponent quits... the points you earned do NOT count... But I just got my 17 point achievement after a guy quit when I had 21 points. So I'm not sure what this one will do.
I've heard that boosing this can be very frustrating... but honestly, If you can muster a field goal and a lucky touchdown every once in a while against randoms you should get this soon. 34 points is not that much at all.
If you are not that good, use a team like the Broncos, 49ers, Seahawks, Chiefs, Ravens, or any other team rated in the upper 80s. And when you are getting matched up with a random opponent, don't play guys that are also using those high rated teams. Wait for someone to pick the Browns, Cardinals, Bills, Jaguars, Vikings, etc.