Excel Spreadsheet

I am an educator and I would like to develop a spreadsheet that calculates
the percentage of student grades. For example, The students took a test and I
would like to know that 80% of the class did 80% or better on any assessment.

Please assist...

Say the data was

Say the data was like:

SMITH	51
JOHNSON	69
WILLIAMS	55
JONES	75
BROWN	65
DAVIS	83
MILLER	74
WILSON	81
MOORE	66
TAYLOR	83
ANDERSON	89
THOMAS	55
JACKSON	66
WHITE	74
HARRIS	84
MARTIN	79
THOMPSON	55
GARCIA	89
MARTINEZ	62
ROBINSON	67
CLARK	65
RODRIGUEZ	59
LEWIS	92
LEE	90
WALKER	73
HALL	90
ALLEN	95
YOUNG	59
HERNANDEZ	94
KING	89
WRIGHT	92
LOPEZ	94
HILL	72
SCOTT	57
GREEN	92
ADAMS	54
BAKER	73
GONZALEZ	74
NELSON	68
CARTER	83
MITCHELL	77
PEREZ	80
ROBERTS	90
TURNER	63
PHILLIPS	52
CAMPBELL	63
PARKER	63
EVANS	81
EDWARDS	62
COLLINS	93
STEWART	55
SANCHEZ	98
MORRIS	95
ROGERS	75
REED	57
COOK	62
MORGAN	66
BELL	62
MURPHY	83
BAILEY	71
RIVERA	61
COOPER	86
RICHARDSON	53
COX	76
HOWARD	97
WARD	76
TORRES	68
PETERSON	58
GRAY	56
RAMIREZ	72
JAMES	84
WATSON	52
BROOKS	82
KELLY	58
SANDERS	81
PRICE	100
BENNETT	78
WOOD	77
BARNES	98
ROSS	92
HENDERSON	91
COLEMAN	79
JENKINS	75
PERRY	63
POWELL	85
LONG	66
PATTERSON	74
HUGHES	93
FLORES	58
WASHINGTON	71
BUTLER	86
SIMMONS	94
FOSTER	78
GONZALES	69
BRYANT	67
ALEXANDER	66
RUSSELL	71
GRIFFIN	70