Since Randy wants to get an average of 94, then the sum of the 5 quizzes should be 94 x 5 = <<94*5=470>>470.
The sum of Randy's score for the first four quizzes is 90 + 98 + 92 + 94 = <<90+98+92+94=374>>374.
Thus, Randy needs to get 470 - 374 = <<470-374=96>>96 in his fifth quiz.
#### 96