Murray scored twice, one a penalty, in the hammering of the Welshmen at the Amex, Albion's biggest ever Premier League win.
He said: "We felt as though if we kept possession we could create spaces in behind them and create chances to score.
"It was important we got the three points and moved up the table a little bit. It's still in the balance and we can't take our foot off the pedal. It's all the old clichés of course but to move out of the mire is nice."