If this is the part of the Walkthrough you are talking about...
Now move clockwise from there N symbols, where N is the number of orbs that vibrated. Where you land is the new symbol.
Then it seems that the "N" is not an N Symbol, "N" represents the number of moves (orbs that vibrated), in your case 4. So if we replaced the "N" with 4 the walkthrough would read for you like this... "Now move clockwise from there 4 symbols. Where you land is the new symbol."
Because the number of vibrating orbs is random and different for each player the walkthrough author used "N" as a generic way for you to insert your unique number there.
By your explanation above it looks as if you have already moved the required spaces and have the new symbols you need. I hope I explained this OK and haven't confused the issue more.