You might want to look at Tk::Chart. For a simple example, you can use the canvas like in the following example. It's up to you to correlate the point plots with their values.

#!/usr/bin/perl
use Tk;

my $mw = MainWindow->new();
$mw->geometry("600x400+50+50");

$canvas = $mw->Canvas(width => 600, height => 400)->pack();
$canvas->Tk::bind("<Button-1>", [ \&print_xy, Ev('x'), Ev('y') ]);

sub print_xy {
  print "@_\n";
  my ($canv, $x, $y) = @_;
  print '(x,y) = ', $canv->canvasx($x), ', ', $canv->canvasy($y),"\n" 
+;
 
}

MainLoop;
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