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I want to display the portion of the curve Plot[Exp[-x^2], {x, 0, 1}, PlotStyle -> {Blue}, Filling -> Bottom, GridLines -> {{0.6}, {0.7}}] (and the area under it) to the right of x=0.6.

enter image description here

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plot = Plot[{Exp[-x^2], ConditionalExpression[Exp[-x^2], .6 <= x <= 1]}, {x, 0, 1}, 
 PlotRange -> {0, 1},
 PlotStyle -> Blue, 
 Filling -> {2 -> Bottom}, 
 GridLines -> {{0.6}, {0.7}}]

![enter image description here

Area @ BoundaryDiscretizeGraphics @ plot

0.211665

Alternatively,

Integrate[Exp[-x^2], {x, .6, 1}]

0.211671
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    $\begingroup$ The area is Area[ImplicitRegion[ 1/E <= y <= Exp[-x^2] && 3/5 <= x <= 1, {x, y}]] // Simplify which evaluates to -(2/(5*E)) - (1/2)*Sqrt[Pi]*Erf[3/5] + (1/2)*Sqrt[Pi]*Erf[1] or approximately 0.0645188 $\endgroup$
    – Bob Hanlon
    Jun 12, 2021 at 19:36

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