The Toffees had challenged for a Champions League spot, but have struggled for goals in recent weeks, scoring considerably fewer than their top-four rivals, and now must settle for a place in the Europa League.
On Sunday they face Merseyside rivals Liverpool, who can still overhaul the Toffees, and Moyes has urged his team to find the killer instinct they have lacked this season.
Everton are 14/1 with BetVictor to beat Liverpool 1-0
"We have just dried up a little bit on the goals side at this moment in time.
"I couldn't say all year that we have been banging them in as I would like, but I think we have been up there with the most shots and crosses.
"We have made plenty of attempts, but then we are maybe just not getting the finish to it.
"So it is something we have got to try to make sure of in these final three games - that when we get opportunities, we take them, we are clinical and we make them count."Although Everton have struggled to score goals, they have had little problem stopping them and boast one of the meanest defenses in the league, a fact which Moyes is very proud of.
"It has been good and I'm pleased that we have tightened up," the Scottish boss continued.
"It is important that you get a certain amount of clean sheets during the season and we are beginning to get much closer to it now."