West Ham manager Sam Allardyce was pleased with referee Chris Foy for getting right a 'make-or-break' decision.
The game at Carrow Road finished goalless and was always a tight affair but just before the break the home side appealed for a penalty when James Collins fouled Andrew Surman on the edge of the box and the home fans were insistent a spot-kick should have been given.
However, replays showed Foy correctly ruled the challenge was just outside the area.
Allardyce was thankful that Foy got it right, and when asked if the referee deserved credit, he told Sky Sports: "No doubt about that. Those decisions can make or break you.
"Chris has made a correct decision today and by the looks of it, where the player finished, he could easily have thought that was in the box.
"Luckily for us it was a major decision the referee got right and I'm really pleased about that."
Allardyce was happy with a 'hard earned point' and his team's third clean sheet in four Premier League games since their promotion but felt his side could have taken something from the match.
"I think we should have scored in the first stage of the game, that is when we were at our best but the chances came and went," he continued.
"Then as I expected Norwich came back into the game as they did and in the end, it is away from home and a hard earned point and another clean sheet, three clean sheets in four games is an excellent record to start back in the Barclays Premier League when you have just been promoted.
"It was an entertaining game, it was not as if both teams sat back, we both went attacking and there were chances at both ends.
"Overall I am pleased as we picked up a point away from home, clean sheet and we move on.
"We enjoyed coming here and playing and we have got a result and now move onto Sunderland where we look for three points."