The answer to your problem depends on whether you were asked to write an expression or an inequality
If you were asked to write an expression
we would assign a letter to "a number"
Let n be "a number"
since more than is addition we would write
Fourteen more than a number
14+n
If you were asked to write this as an inequality, the bigger item points to the smaller one
Since fourteen is more than a number
14>n
