Here is a data set (n=117n=117) that has been sorted.

47.4	48.1	48.2	48.2	49.1	50.4	51.9	52.3	53.3
53.3	53.5	53.5	53.8	53.9	54.6	54.9	55.1	55.2
55.5	55.5	55.7	56.2	56.2	56.6	56.9	57.3	57.7
57.8	57.9	58	58.2	58.2	58.5	60.1	60.1	60.2
60.7	61	61.3	61.3	61.7	61.8	62	62	62.1
62.3	62.4	62.5	62.7	62.8	62.8	62.9	63	63.3
63.5	63.6	63.9	63.9	64.3	64.5	64.6	64.9	65.1
65.1	65.2	65.2	65.4	65.5	65.9	66	66.6	66.6
66.7	66.9	67.3	67.3	67.3	67.3	67.6	67.7	67.9
67.9	68.3	68.4	68.5	68.6	68.6	68.6	69.3	69.8
70.3	70.4	70.4	70.6	70.8	71	71.7	71.7	72
72.2	72.5	72.5	72.7	73.1	74	74.3	74.7	75.9
76.4	77	77	77.4	77.5	80.1	80.7	82.7	88.3

Find the 84th-Percentile: P₈₄ =