Solution: Let's assume that the scores of five students are A, B, C, D and E respectively. From the meaning of the question, we can get:

(a+b+c+d)/4=88

a+b+c+d=352

(a+b+c+d+e)/5=90

a+b+c+d+e=450

e=450-352=98

So, another student's score is 98 points.