Three consecutive even numbers have a sum where one half of the sum is between 84 and 96

86 * 2 = 172

172/3 = 57.33

54 + 56 + 58 = 168

168/2 = 84

56 + 58 + 60 = 174

174/2 = 87

58 + 60 + 62 = 180

180/2 = 90

60 + 62 + 64 = 186

186/2 = 93

62 + 64+66 = 192

192/2 = 96

there are 3 sets of numbers that fall between 84 & 96

1 set equals 84 and 1 set equals 96

so if you are counting those there are 5 sets