The area of 0.195 to the right of z under the normal curve is
Since the total area under the normal curve is 1. therefore, the area to the left of normal is 1-0.195 = 0.805.
[tex]P(ZRefer Standard normal table/Z-table, Lookup for z-score corresponding to area 0.805 to the left of the normal curve[tex]P(Z<0.86)=0.805" src="
Hence the value of z is 0.86.