Question 363489
First, your z value is off (you used 5.55 instead of 5.5).
{{{z[1]=(x-mu)/sigma=(5.8-5.5)/0.65=0.462}}}
{{{P(z[1])=0.678}}}
67.8%
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{{{z[2]=(6.3-5.5)/0.65=1.231}}}
{{{P(z[2])=0.891}}}
89.1% of apples have diameter less than or equal to {{{6.3}}}.
100%-89.1%=10.9% have diameters greater than {{{6.3}}}.
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