There is always more to be said,but this answer from /u/restricteddata answers your question pretty neatly. The bottom line up front is that the German nuclear program was never really focused on producing a bomb, as they assessed it as being impractical at that point in the war. US fears of a Nazi nuclear or dirty bomb project were what the influential historian of the Manhattan Project Richard Rhodes describes as a "dark mirror" - when you think about what secret weapons your enemy is developing, you often see your own efforts and fears reflected, rather than what they may actually be doing.
There are a number of answers here on Norsk Hydro and the German nuclear program:
Why didn't Nazi Germany construct additional heavy water plants?
How consequential was the Telemark raid on hindering the German nuclear research program in 1943?
Separate from those, and specifically address to your question about the impact: the raid did disrupt the German reactor program a bit. But the reactor program was not a bomb program; even if the sabotage had never happened, the Germans would not have developed an atomic bomb in time for use in the war. They were nowhere near having an atomic bomb, and that was because they did not really have an atomic bomb production program — they had a very modest reactor research program. They are not the same thing at all.
The sabotage of Norsk Hydro was a brave and daring act, and done because the Allied forces really did believe the Germans had an atomic bomb program, but even in 1945 they understood that the sabotage was not essential towards stopping the German atomic bomb, because the German effort was much more modest than they had assumed. This makes for a tricky thing in historical memory: Allied countries like to valorize and dramatize the mission, and rarely in those stories do they end with, "but none of it really mattered, in the end."