A z-score of 70 would cover 35 standard deviations away from the mean. Note though, that a z-score of just 2.5 already covers 99% of the data. A z-score of 70 is incredibly high, and so is either a mistake, or will cover 100% of the data without fail. If a data point lies outside this, it is definitely an outlier and probably an error.
zscore
7000
7000 - (0.06 * 7000) = 6580 or 7000 * (100-0.06) - 6580
37% of 7,000= 37% * 7000= 0.37 * 7000= 2,590
21% of 7,000 = 21% * 7000 = 0.21 * 7000 = 1,470
zscore
7000
7000 X 7000= 49000000
7,000
7000
105015% of 7000= 15% * 7000= 0.15 * 7000= 1050
2.8% of 7000= 2.8% * 7000= 0.028 * 7000= 196
7000 - 22% = 78% of 7000 = 7000*78/100 = 5460
1% of 7000= 1% * 7000= 0.01 * 7000= 70
1402% of $7000= 2% * $7000= 0.02 * $7000= 140
7000
7000